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This article demonstrates how to check whether OpenCL driver is installed on your PC. Select your OS:
Download clinfo Windows binary file from https://github.com/Oblomov/clinfo.
Launch the Command Prompt by pressing Win + R keys on the keyboard, then type cmd and press Enter.
Navigate to the directory that contains the downloaded file (clinfo.exe) and execute the following command:
This will print a synthetic summary about all OpenCV platforms on the system and the devices they expose.In case the number of platforms is equal to 0 you need to install the OpenCL driver. The simplest way to do this is by installing the latest GPU drivers:
Open a terminal window by pressing Ctrl + Alt + T keys on the keyboard, then execute the following commands:
sudo apt install -y clinfo
This will print all available information about all OpenCL platforms on the system and the devices they expose.